400kv/330kv 4000A Outdoor Gas Circuit Breaker

S/NO.

PARAMETER DESCRIPTION

UNIT

PERFORMANCE GUARANTEE

330KV SF₆ CB

1

Scope: Design, manufacture, testing, supply & installation.

Yes + Supervision by accredited personnel

2 Design & Construction

2.1

Type designation

2.2

Reference Standard

IEC 62271-100

IEC 62271-1

2.3

No. of poles/circuit breakers

3

2.4

Type of control mechanism

Motor operated spring

2.4.1

Mechanical class

M2

2.5

Protection level of electrical cubicle

IP54

2.6

Protection level of operating mechanism

IP55

2.7

Type of and colour insulator

Porcelain, brown

2.8

Insulating gas

SF₆

2.9

Rated absolute pressure at 20^oC

2.10

Relative leakage rate

%/yr

0,5%

2.11

Circuit breaker class

Outdoor

2.12

Support structures supplied

Yes

3 Service Conditions

3.1

Altitude of installation

m

1300

3.2

Operating ambient temperature

^oC

-1 to +40

3.3

Relative humidity

%

80

3.4

Pollution levels

mm/kV

25

4 Rated Characteristics

4.1

Rated voltage

kV

330

4.2

Maximum service voltage

kV

362

4.3

Rated frequency

Hz

50

4.4

Rated continuous current

A

4000

4.5

Rated peak withstand current

kA_pk

125

4.6

Rated short time withstand current

kA

50

4.7

Rated duration of short circuit

s

3

4.8

One min. power frequency withstand voltage:

-        phase to earth

kV

450

-        Across open contacts

kV

520

4.9

Rated lightning impulse withstand voltage:

-        phase to earth

kV_pk

1175

-        across open contacts

kV_pk

1175 (+205)

4.10

Rated switching impulse withstand voltage:

-        phase to earth

kV_pk

950

-        across open contacts

kV_pk

800 (+295)

5. Breaking and Making Characteristics

5.1

Rated short circuit breaking current

kA

50

5.2

First pole to clear factor

1.3

5.3

DC component (% of AC component)

50

5.4

Peak value of rated short circuit making current

kA_pk

125

5.5

Rated breaking current for short line faults

As per IEC Standard

5.6

Rated out of phase breaking current

Id (kA)

12,5

5.7

Rated overvoltage factor for unloaded transformers

2.5

5.8

Rated line charging breaking current

A

255

5.9

Rated cable charging breaking current

355

6. Operating Times

6.1

Rated opening time - from opening coil energizing to separation of main contacts

ms

24

6.2

Rated breaking time - from opening coil energizing to arc extinction

ms

40

6.3

Rated closing time - from closing coil energizing to main contact making

ms

110

6.4

Rated operating sequence

O-0.3s-CO-15s-CO

6.5

Rated operating sequence without motor supply

O-CO

7. Low Voltage Specification

7.1

Motor voltage

V

220, DC

7.2

Circuit motor protection

MCB

7.3

Motor voltage min. range

%

85

7.4

Motor voltage max. range

V

220, DC

7.5

Opening voltage min. range

%

65

7.6

Opening voltage max. range

%

110

7.7

Closing voltage min. range

%

75

7.8

Closing voltage max. range

%

110

7.9

Lighting and heating circuit voltage

V

220, AC

7.10

Local electrical control with two push button

Yes

7.11

Anti-pumping relay

Yes

7.12

Local/remote selector switch

Yes

7.13

Number of trip coils

2

7.14

Provision for trip coil supervision

Yes

7.15

Pole discrepancy feature

Yes

7.16

Signalling contacts for spring position

Yes, 1NO

7.17

Number of available auxiliary NO contacts

8

7.18

Number of available NC auxiliary contacts

8

7.19

Position indicator - O/I

Yes

7.20

Indicator for spring status

Yes

7.21

Gas for first filling plus 30%

Yes

7.22

SF₆ filling equipment supplied

Yes

7.23

SF₆ gas leakage detector supplied

Yes

8. Documents and Drawings with Bid

8.1

Circuit breaker outline drawing

Yes

8.2

Foundation detail drawings

Yes

8.3

Quality assurance certification

Yes

8.4

Typical low voltage elementary diagram

Yes

9. Test Reports with Bid

9.1

Dielectric test

Yes

9.2

Temperature rise test

Yes

9.3

Short time withstand current test

Yes

9.4

Mechanical endurance test

Class M2 - 10,000 operations

9.5

Capacitive current breaking test

Yes

9.6

Operating times test

Yes

9.7

Main contact resistance test

Yes